Improvement in draft-regulators for steam-boilers



UNITED STATES H. N. VINANS, OF NEW7 YORK, N. Y.

PATENT GEEICE.

IMPROVEMENT IN DFtAFT-IDLEGIULATOFtS4 FOR S"l'EAl\/l-BOILEFLS.1

Specification forming part of Letters Patent No. 411359921', dated November 8, 1864.,

To @ZZ whom it may concern,.-

Beit known that I, H. N. VVINANS, of the city, county, and State of New York, have invented a new and useful Improvement in the Smoke-Box of Locomotive-Boilers; and I hereby declare that the following is a full and exact description thereof.

The nature of my invention consists in arranging an addition to the diaphragms in the smoke-boxes oflocomotive-boilers,when placed vertically therein between the line-sheet and exhaustpipes, so as to extend back and rest against 'the line-sheet about the top row of iiues, in order to compel a more general descent of the gases and a more uniform draft to the lower lines.

To enable others skilled in the business to make and use my invention, I proceed to describe its construction and operation, reference being had to the drawings hereunto annexed, a'id making part of this specification, also to the letters of reference denoted therein, the same letters referring to the same things throughout, and forming a part of the speciiication.

Figure I represents a perspective front elevation of my improved dialihragni A', Fig. 2, as seen looking down through mouth of chimney, showing part of diaphragm; Fig. 3, a longitudinal section, with side view otl diaphragm. Fig. et shows diiferent shapes and positions of the diaphragm. Fig. 5 represents the arrangement peculiar to the diaphragm used as a feed-water heater.

To the diaphragms now used in locomotives, known as Vood and Winans-diaphragm,77

or its equivalent, consisting of a plain imperiorated sheet of iron placed in the smoke-box between the exhaust-pipes and the flue-sheet, extending from about the upper row of lines to about. on a line with the lower row ofiiues, a few inches less in size than the boiler, so there shall be a free space around it. I add at or near the top of it an extension of about live inches in depth, ruiming back to and resting against the liuc-sheet about on a line with the upper row of fines, thus shutting oft' the direct escape of the gases tothe chimney by compelling them to pass under and around the diaphragm, leaving the exhaust free to act and giving the draft a more uniform flow, particularly to the bottom fines. This addition should conform to the width of the diaphragm, leaving sufficient space at the ends for the escape ofthe smoke and cinders. About two inches l have found proper for freightengines, and three to four inches for passenger-engines. The space, however, must be regulated aecordin g to the style of engine and the diaphragm used.

A represents the diaphragm of Vood and Vinans in general use; A', my improvement or the extension claimed; B, the due-sheet; 0 O, spaces' at the ends for the escape of smoke and cinders; D and E, different forms and positions in which it may be placed. Fig. 5 shows the arrangement as applicable to a water'heater, but not at present claimed.

As engines vary in construction and draft, I do not conne myself to any particular width, depth, or angle of my improvement, nor to an exact location of it against the iiuesheet, as it may be found expedient in some engines to put it below the upper row ofilues; but it must not extend beyond the diaphragm as used by lood and 'inans, which is between the exhaust and lines, in such position as not to interfere with the free escape of the exhaust-steam, consequently does not extend over or beyond the exhaust-pipes.

What I claim as new, and desire to secure by Letters Patent, is

An improved diaphragm, as at a, constructed and arranged substantially as within described, and for the purposes set forth.

H. N, WINANS.

Witnesses z `OwEN G. WARREN, J. D. STURTEVANT. 

